Problem Statement

When in creative mode, you expect items in your hotbar to remain static. This does not occure with the milk jar.

Expected Behavior

When right clicking the milk jar with a bucket of milk, the jar will fill, but your bucket will still be full as well.

When right clicking a milk jar with an empty bucket, the jar will empty, but your bucket will still be empty as well.

Actual Behavior

When right clicking the milk jar with a bucket of milk, the jar will fill, and the bucket empties.

When right clicking the milk jar with an empty bucket, the jar will empty, and the bucket fills.

Steps to Reproduce

1. Enter Creative Mode.
2. Create a milk jar.
3. Right click it with a bucket of milk. Observe how your bucket of milk empties.
4. Right click it again with your empty bucket. Observe how your bucket fills.